A good skeptic should ask, "is the underlying technology/protocol of Bitcoin sound?" If it is, then all those tertiary issues will be solved over time because the marketplace wants to profit from the efficiency of frictionless-money.
There is too much profit to be made from a Bitcoin world for entrepreneurs to ignore such a revolutionary technology merely because they cannot yet purchase gasoline down the street.
I think the majority of Bitcoin skeptics who spend time on this forum are not skeptical about Bitcoin as a concept. Instead, they are skeptical about bitcoins holding their current valuations. However, these same skeptics might think future currencies based on the Bitcoin concept will be wildly successful. There is a big difference between the Bitcoin concept having long term value and bitcoins having long term value and skeptics tend to be aware of this difference. Skeptics may view the Bitcoin concept as revolutionary as search engines or social media but the skeptics are likely to think of Bitcoin as an Altavista or Myspace and imagine there will be lots of competitors that come and go with eventual leaders becoming dominant like Google and Facebook.